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Best Time for Glacier Country: Going-to-the-Sun
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Sweet spot: May, July, August. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
💡 Good to know
- The full Going-to-the-Sun Road is normally open to through traffic in this window, but weather, rockfall, construction and congestion can still close or restrict it. Check the dated National Park Service road status before setting out.
- This product depends on the full alpine Going-to-the-Sun Road through Logan Pass. The complete road normally closes outside the short summer season, so Odycairn does not generate this through-route in these months.
| Month | Low | High | Rain | Daylight | |
|---|---|---|---|---|---|
| January | −12.0°C | −4.2°C | 74 mm | 8.5 h | ❄ |
| February | −12.4°C | −3.6°C | 61 mm | 9.9 h | ❄ |
| March | −7.5°C | 1.0°C | 72 mm | 11.6 h | ❄ |
| April | −3.1°C | 6.8°C | 66 mm | 13.4 h | ❄ |
| May | 2.2°C | 13.7°C | 77 mm | 15.0 h | ❄ |
| June | 6.3°C | 17.9°C | 96 mm | 15.9 h | |
| July | 10.7°C | 24.2°C | 30 mm | 15.5 h | |
| August | 9.7°C | 24.1°C | 34 mm | 14.1 h | |
| September | 4.8°C | 18.0°C | 47 mm | 12.3 h | |
| October | −1.4°C | 8.6°C | 63 mm | 10.5 h | ❄ |
| November | −6.7°C | 0.6°C | 77 mm | 8.9 h | ❄ |
| December | −12.3°C | −4.7°C | 74 mm | 8.1 h | ❄ |